Many locals are delighted with the mural. On the Brim Active Community Group Facebook page, Jamie Pratt said he was "proud to be in a district that has gone out on an artistic limb and done such an incredible thing. Pfffft the big banana giant koala, we got a guido special".

Van Helten said a passerby had compared it to Mount Rushmore, the giant sculpture of four US presidents in South Dakota.

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Julie Walsh, from nearby Warracknabeal said Brim was "on the map now and so, so deserving of all the attention. I hope this really boosts business for you ... I might be from Warrack, but I'm as proud as punch of Brim."

Brim Active Community Group president Shane Wardle​, whose family has farmed in the town since 1894, reckons it's the biggest thing to ever happen in the town of about 100 people and a welcome boost at a time of drought and shrinking population.

"The pub's sold more meals and drinks, and the shop's sold more ice creams," he said.

Visitors have come from Brisbane and Melbourne to see it, and it has drawn interest from as far as London.

The project came to Brim out of the blue. Van Helten has done similar giant portraits in Ukraine, Norway, Italy, Denmark and Iceland, and he asked street artist management company Juddy​ Roller to find him silos in Victoria.

GrainCorp came up with a disused set at Brim, which dominate the town facing west over the highway. Funds were provided by Regional Arts Victoria and the Yarriambiack​ Shire Council, paint was donated by Taubmans​ and Loop Paints, and the local caravan park and pub provided free accommodation and meals.

Van Helten took photos of locals and mapped the work on computer, but a challenge was to accommodate the silos' curves.

Mr Wardle said the identities of the three men and one woman depicted were known but had not been publicised. "It's about the art," he said. "It's trying to capture the spirit of the local area. And he's done a great job."

Van Helten said that if the images are kept to archetypes, "people can have their own connection with it".